Ambient Noise Sensing Microphone

An ANS detects the ambient noise to ensure the volume of any broadcast is adjusted and can be clearly heard

When designing a voice alarm system for areas of variable and fluctuating noise levels which can cause problems when it comes to audibility, Ambient Noise Sensors (ANS) are the perfect solution. Correctly placed, ANS will ensure that announcements are always clearly heard.

Baldwin Boxall ambient noise sensing microphones constantly monitor the ambient noise level within the area (or zone) and causes the volume of announcements to be automatically adjusted to an audible level, thus ensuring clarity. Background music is also adjusted to maintain the right atmosphere.

There are two ANS units available in the range, including a weather-proof unit.

Two ANS microphones can be wired in parallel, on the same input, to monitor the ambient noise over a larger area.

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Further Information

Features

Monitors the ambient noise in a given area
Automatically adjusts the power of the amplifiers, depending on noise levels
When the area is at its quietest the level of the announcements, or music, will reduce
During busy/noisy periods the volume level adjusts to suit
Uses a dynamic microphone capsule, the output of which is amplified and converted to produce a variable current
Band pass filtering ensures that the system only responds to ambient noise affecting the intelligibility of announcements
An on-board surveillance tone generator permanently monitors the microphone capsule. A system fault will be indicated should the microphone capsule or on-board amplifier fail
The BVRAMB includes an option to allow one of three response speeds to be selected:
- SLOW – the system will only respond to an average change of ambient noise
- MEDIUM – suitable for most installations
- FAST – the system will react to short duration changes in ambient noise
Two units can be wired in parallel on the same input to monitor the ambient noise over a larger area

Product Range

BVRAMB
ANS – standard unit
141mm x 81mm x 44mm

BVRAMBIP
ANS – weatherproof unit
116mm x 116mm x 60mm

Key Benefits

Safe & Compliant

BS EN 54: Fire Detection & Fire Alarm Systems, is a mandatory standard that specifies requirements and laboratory testing for every component of fire detection and fire alarm system.

UKCA (UK Conformity Assessed) marking on products replaces CE marking in the UK and requires that certification of construction products, such as VACIE / Voice Alarm Control & Indicating Equipment is performed by a UK-based approved body.

BS 5839-8 is a BSI Standards Publication code of practice providing recommendations for the design, installation, commissioning, and maintenance of voice alarm systems that automatically broadcast speech or warning tones, in response to signals from their associated fire detection and fire alarm systems.